<div dir="ltr"><div><div>I've never tried something like this myself, but I believe it would work if you stop the EBS cluster (*NOT* terminate), and then change the instance type from the EC2 management Console, and then restart the cluster, then StarCluster would happily reconfig the cluster for you:<br><br><a href="http://star.mit.edu/cluster/docs/latest/manual/launch.html#stopping-an-ebs-backed-cluster">http://star.mit.edu/cluster/docs/latest/manual/launch.html#stopping-an-ebs-backed-cluster</a><br><br></div>Just a reboot won't do it, as the private IP address changes when you change the instance type, and /etc/hosts would need to be changed again.<br><br></div>(Test with a 2-node t1.micro cluster and change the type to t2.micro before doing anything experimental on a real production cluster.)<br><div><div><div class="gmail_extra"><br clear="all"><div>Rayson<br><br>==================================================<br>Open Grid Scheduler - The Official Open Source Grid Engine<br><a href="http://gridscheduler.sourceforge.net/" target="_blank">http://gridscheduler.sourceforge.net/</a><br><a href="http://gridscheduler.sourceforge.net/GridEngine/GridEngineCloud.html" target="_blank">http://gridscheduler.sourceforge.net/GridEngine/GridEngineCloud.html</a></div>
<br><div class="gmail_quote">On Wed, Sep 17, 2014 at 10:53 PM, Ramon Ramirez-Linan <span dir="ltr"><<a href="mailto:rlinan@navteca.com" target="_blank">rlinan@navteca.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi,</div><div><br></div><div>Is there a way of changing the instance type for the entire cluster after it has already be launched?</div><div><br></div><div>I want to launch a 30 nodes cluster with a cheaper instance type to ingest data on each node's volume. Each node has a 1TB EBS attached and there is no need to share data between nodes (no nfs or anything). Then once the data is injected on each node I want to be able to change the cluster instances to a more expensive one (more CPU/RAM)</div><div><br></div><div>Will cluster reboot let me do that?</div><div><br></div><div>Thanks in advance</div><div><br></div><br><div class="gmail_extra"><br clear="all"><div><div dir="ltr"><div></div><font color="#073763"><font face="arial narrow, sans-serif"><span style="font-size:11pt"><img src="cid:image009.jpg@01CF448F.3FF02AB0" alt="logo" style="font-size:11pt" height="46" width="176"></span></font><br><font face="arial, helvetica, sans-serif"><span style="font-size:11pt">Navteca</span><br><span style="font-size:11pt">Ramon Ramirez-Linan</span><br><span style="font-size:11pt">C: </span><a value="+13017899139" style="font-size:11pt">301.789.9139</a><br><span style="font-size:11pt">O: </span><a value="+12025051553" style="font-size:11pt">202.505.1553</a><br><u><span style="font-size:11pt"><a href="http://www.navteca.com/" target="_blank">www.navteca.com</a></span></u></font></font><div><font color="#073763" face="arial, helvetica, sans-serif"><span style="font-size:14.545454025268555px"><br></span></font></div><div><font color="#073763" face="arial, helvetica, sans-serif"><span style="font-size:14.545454025268555px">6301 Ivy Lane, Greenbelt, MD 20770</span></font></div><div><font color="#073763" face="arial, helvetica, sans-serif"><span style="font-size:14.545454025268555px">Suite 700<br></span></font><div><font color="#073763"><font face="arial, helvetica, sans-serif"><span style="font-size:14.545454025268555px"><u><br></u></span></font><span style="font-family:'arial narrow',sans-serif;font-size:11pt"><img src="cid:image010.jpg@01CF448F.3FF02AB0" alt="script" style="font-size:11pt" height="19" width="237"></span></font><div><img src="cid:image011.png@01CF448F.3FF02AB0" alt="https://s3.amazonaws.com/www.navteca.com/img/certified.png" style="color:rgb(7,55,99);font-family:'arial narrow',sans-serif" height="38" width="96"> <span style="color:rgb(7,55,99);font-family:'arial narrow',sans-serif"> </span><img src="https://s3.amazonaws.com/www.navteca.com/img/CCC_LOGO_OFFICIAL.jpeg" style="color:rgb(7,55,99)" height="35" width="96"><br></div></div></div></div></div></div></div>
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